Scientific evaluation papers investigate existing problem situations or validate proposed solutions with scientific means, such as by experiment or case study. There is a growing amount of literature about how to report about empirical research in software engineering, but there is still some confusion about the difference between a scientific evaluation paper and other kinds of research papers. This is related to lack of clarity about the relation between empirical research, engineering, and industrial practice. In this minitutorial we give a brief rundown on how to structure a scientific evaluation papers as a special kind of research paper, using experiment reports and case study reports as examples. We give checklists of items that a reader should be able to find in these papers, and sketch the dilemmas that writers and readers of these papers face when applying these checklists.